Trane Flame Sensors

Trane flame sensors are official OEM replacement components for Trane and American Standard HVAC equipment, designed to restore proper flame sensing function in Trane gas furnaces when the original sensor fails, becomes contaminated, or produces out-of-range microamp readings that cause nuisance lockouts. A flame sensor is a small stainless steel rod mounted in the burner assembly that carries a small alternating voltage from the ignition control board, generates a DC microamp signal when flame is present, and signals the control board to keep the gas valve open. Without a properly functioning flame sensor, the furnace fires, fails to prove flame within the trial-for-ignition period, shuts down, and locks out. The Trane flame sensor category at SupplyHouse includes OEM sensors in multiple part number configurations, a Nikrothal 80 sensor for specific Trane furnace applications, flame sensor leads, and a Radiant Flame Sense Conversion Kit, plus an aftermarket equivalent from Packard. All Trane OEM flame sensors are verified replacement components for Trane HVAC equipment.

KEY SUBCATEGORIES / PRODUCT TYPES

Trane OEM Flame Sensors - Standard Replacement Series

Trane OEM standard flame sensor replacements are the direct-from-Trane part number components for service technicians replacing a failed or degraded sensor on a Trane gas furnace. Current active part numbers in the standard sensor series include the SEN02662 (SKU SEN02662), an official OEM Flame Sensor for Trane HVAC equipment. The SEN00233 (SKU SEN00233) is the active current-number replacement for the discontinued SEN0233, with no modifications made to the replacement product. The SEN00297 (SKU SEN00297) is the active current-number replacement for the discontinued SEN0297, again with no modifications made. The SEN01951 (SKU SEN01951) is an official OEM Flame Sensor Replacement for Trane HVAC equipment. Confirming the correct part number from the furnace model number and wiring diagram or from SupplyHouse's compatibility tool before ordering is required, as flame sensor part numbers are specific to the Trane furnace series and cannot be assumed to interchange across models.

Trane Nikrothal 80 Flame Sensor - SEN01114

The Trane SEN01114 (SKU SEN01114) is an official OEM Nikrothal 80 Flame Sensor for Trane HVAC equipment. Nikrothal 80 is a nickel-chromium alloy used for the sensing rod element in specific Trane furnace flame sensing assemblies. The SEN01114 is the active replacement for the discontinued SEN1114, with no modifications made between the original and the current part number. An aftermarket equivalent for the SEN01114 is also available from Packard (SKU PFS114), confirmed as a replacement for the Trane SEN01114. Confirming compatibility with the specific furnace model before specifying the SEN01114 or PFS114 is required, as the Nikrothal 80 sensor serves a distinct set of Trane furnace configurations from those that use the standard flame sensor series.

Trane Flame Sensor Lead - LED0284

The Trane LED0284 (SKU LED0284) is an official OEM Flame Sensor Lead for Trane HVAC equipment. A flame sensor lead is the insulated wire that connects the flame sensor rod to the ignition control board, carrying the microamp signal from the sensor to the control. On installations where the sensor rod tests within spec but the furnace is still exhibiting nuisance lockouts, a damaged or deteriorated lead wire with compromised insulation can be the cause of signal loss or erratic flame sensing readings. Replacing the lead independently of the sensor is the correct diagnostic step when the sensor rod itself reads within acceptable microamp range but lead insulation damage is visible.

Trane Radiant Flame Sense Conversion Kit - KIT09660

The Trane KIT09660 (SKU KIT09660) is an official OEM Radiant Flame Sense Conversion Kit for Trane HVAC equipment. A radiant flame sense conversion kit upgrades or converts the flame sensing system in specific Trane furnace models from one sensing configuration to a radiant sensing configuration. The KIT09660 is the active replacement for the discontinued KIT9660. Confirming the specific Trane furnace model number against Trane's service documentation before ordering the KIT09660 is required, as the conversion kit applies to specific furnace configurations and isn't a universal installation.

BUYING GUIDE / HOW TO CHOOSE

Selecting the correct Trane flame sensor starts with the furnace model number and the existing part number on the sensor being replaced. Trane flame sensor part numbers are furnace-specific. Assuming any Trane flame sensor will fit any Trane furnace is the most common ordering mistake in this category. The model number is on the rating label inside the furnace cabinet door, and the existing sensor's part number is typically stamped or printed on the sensor body or available from the furnace's wiring diagram.

SupplyHouse's compatibility tool, accessible from any product page in the Trane Flame Sensors category, allows lookup by furnace model number to confirm which sensor part applies. This is the most reliable verification step before ordering, because a sensor that doesn't fit or doesn't make contact correctly in the burner bracket won't solve a flame-sensing lockout.

The distinction between a standard replacement sensor, the Nikrothal 80 SEN01114, and the Radiant Flame Sense Conversion Kit KIT09660 matters. The standard sensors (SEN00233, SEN00297, SEN02662, SEN01951) are like-for-like replacements for the original sensor in the applicable furnace. The SEN01114 is a Nikrothal 80 alloy sensor for specific Trane furnaces that use that element type. The KIT09660 is a conversion kit, not a simple replacement, and installs a different sensing configuration rather than replacing a failed sensor with an identical unit.

If the flame sensor rod itself tests within spec using a multimeter set to DC microamps (typically 1 to 4 microamps with flame present is a healthy range for most sensors, though confirmation against the specific furnace service manual is required), but the furnace is still locking out on flame failure, the lead wire (LED0284) is the next component to inspect. Visible cracks, heat damage, or compromised insulation on the lead wire can cause intermittent or lost signal even when the sensor rod is functioning correctly.

Replacing a Trane flame sensor is a straightforward field repair. Power off the furnace, disconnect the lead, remove the sensor's mounting screw, pull the sensor, install the new sensor in the same bracket position, reconnect the lead, and restore power. Never handle the new sensor rod with bare hands, as skin oils can contaminate the rod surface and can affect the sensor's ability to pass the microamp signal through the flame envelope.

FAQs

What is a Trane flame sensor and what does it do?

A Trane flame sensor is an OEM replacement rod-type sensing component that mounts in the burner assembly of a Trane gas furnace and proves the presence of flame to the ignition control board after ignition. The sensor carries a small voltage from the control board, and when the sensor rod is surrounded by flame, it generates a DC microamp signal that tells the control board the gas valve can remain open. If the sensor fails to generate a sufficient signal within the trial-for-ignition period, the control board closes the gas valve and initiates a lockout sequence. Replacing a degraded or failed Trane flame sensor restores correct flame proving and stops nuisance lockout cycles.

What is the Trane SEN01114 Nikrothal 80 Flame Sensor and how does it differ from standard sensors?

The Trane SEN01114 is an OEM Nikrothal 80 Flame Sensor, distinguished by its sensing rod material: Nikrothal 80, a nickel-chromium alloy used in specific Trane furnace flame sensing assemblies. The SEN01114 is the active replacement for the discontinued SEN1114, with no modifications between the original and current part number. Standard Trane flame sensors in the SEN00233, SEN00297, SEN02662, and SEN01951 series use different rod configurations suited to their respective furnace applications. Confirming whether the furnace in service requires the Nikrothal 80 sensor or a standard sensor requires verifying the original part number from the furnace model documentation before ordering.

What discontinued Trane flame sensor part numbers have been replaced, and what are the current replacements?

Two standard Trane flame sensor part numbers were discontinued in March 2022 and replaced with updated part numbers carrying no product modifications. The SEN0233 was replaced by SEN00233 (SKU SEN00233), and the SEN0297 was replaced by SEN00297 (SKU SEN00297). The Nikrothal 80 sensor SEN1114 was discontinued in February 2022 and replaced by SEN01114 (SKU SEN01114), also with no modifications. The Radiant Flame Sense Conversion Kit KIT9660 was replaced by KIT09660 (SKU KIT09660). All current replacement part numbers are the active OEM Trane components and are the correct parts to order when the older part numbers appear in service documentation.

What is the Trane LED0284 Flame Sensor Lead and when should it be replaced?

The Trane LED0284 is an official OEM Flame Sensor Lead, the insulated wire that connects the flame sensor rod to the ignition control board in the applicable Trane furnace. The flame sensor lead carries the DC microamp signal from the sensor rod to the control board, and a lead with cracked, heat-damaged, or compromised insulation can cause signal loss or erratic flame sensing readings even when the sensor rod itself tests within spec. Replacing the LED0284 lead is the correct diagnostic step when the sensor rod reads acceptable microamp output but intermittent lockouts on flame failure continue and visual inspection of the lead shows insulation damage.

How should the correct Trane flame sensor be identified before ordering?

The correct Trane flame sensor is identified by matching the furnace model number to the applicable part number using the furnace's rating label, wiring diagram, or SupplyHouse's compatibility lookup tool available on any Trane flame sensor product page. The furnace model number is on the rating label inside the furnace cabinet door. The existing sensor's part number may also be stamped or printed on the sensor body. Trane flame sensor part numbers are furnace-specific and don't interchange universally across the Trane gas furnace lineup. Ordering based on part number confirmation prevents a return and keeps the service call on schedule.